January weather forecast and climate
Mirissa, Sri Lanka

A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka, with a sneak view of water approaching the beautiful brown sandy shore
A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka, with a sneak view of water approaching the beautiful brown sandy shore
January is a hot winter month in Mirissa, Sri Lanka, with average temperature varying between 30°C (86°F) and 22°C (71.6°F).

Temperature

In January, the average high-temperature is 30°C (86°F), and the average low-temperature is 22°C (71.6°F).

Rainfall

January is the month with the least rainfall in Mirissa. Rain falls for 5 days and accumulates 89mm (3.5") of precipitation.

Sea temperature

January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

January and December, with an average of 11.8h of daylight, are months with the shortest days.

Sunshine

In Mirissa, the average sunshine in January is 7h.

UV index

Months with the highest UV index are January through October, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays for the average person.
The average daily UV index of 12 transform into the following instructions:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in January in Mirissa?

In Mirissa, in January, the average high-temperature is 30°C (86°F), and the average low-temperature is 22°C (71.6°F).

How much does it rain in Mirissa in January?

In January, in Mirissa, Sri Lanka, the rain falls for 5 days. Throughout January, 89mm (3.5") of precipitation is accumulated.

What is the driest month in Mirissa?

January is the month with the least rainfall in Mirissa. Rain falls for 5 days and accumulates 89mm (3.5") of precipitation.

When is the sea coldest in Mirissa?

January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Mirissa, Sri Lanka. Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the water temperature in January in Mirissa?

In January, the average sea temperature in Mirissa is 28°C (82.4°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the month with the shortest days in Mirissa?

January and December, with an average of 11.8h of daylight, are months with the shortest days in Mirissa, Sri Lanka.

What is the average length of the day in January in Mirissa?

The average length of the day in January in Mirissa, Sri Lanka, is 11.8h.

How many hours of sunshine does Mirissa have in January?

In Mirissa, the average sunshine in January is 7h.

When is the highest UV index in Mirissa?

Months with the highest UV index in Mirissa are January through October, with an average maximum UV index of 12.

What is the UV index intensity in January in Mirissa?

The average daily maximum UV index in January in Mirissa, Sri Lanka, is 12. A UV Index reading of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV rays.
Average temperature in January - Mirissa, Sri Lanka
  • Average high temperature in January: 30°C

Warmest months (with the highest average high temperature) are March and April (31°C).
Months with the lowest average high temperature are August, September, October and December (29°C).

  • Average low temperature in January: 22°C

Months with the highest average low temperature are May and June (25°C).
The coldest month (with the lowest average low temperature) is January (22°C).

Average rainfall in January - Mirissa, Sri Lanka
  • Average rainfall in January: 89mm

The wettest month (with the highest rainfall) is October (305mm).
The driest month (with the lowest rainfall) is January (89mm).

Average rainfall days in January - Mirissa, Sri Lanka
  • Average rainfall days in January: 5 days

The month with the highest number of rainy days is November (14 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in January - Mirissa, Sri Lanka
  • Average sea temperature in January: 28°C

The best month for swimming (with the highest average sea temperature) is April (30°C).
Coldest months (with the lowest average sea temperature) are January, February, June, July, August, September, October and December (28°C).

Average daylight in January / Average sunshine in January - Mirissa, Sri Lanka
  • Average daylight in January: 11.8h

The month with the longest days is June (Average daylight: 12.5h).
Months with shortest days are January and December (Average daylight: 11.8h).

  • Average sunshine in January: 7h

Months with most sunshine are February and March (Average sunshine: 8h).
Months with least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

Average UV index in January - Mirissa, Sri Lanka
  • Average UV index in January: 12

Months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are November and December (UV index 11).

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